Osp A proteins of Borrelia burgdorferi subgroups, encoding genes and vaccines

ABSTRACT

The invention relates to novel Borrelia, and OspA antigens derived therefrom. These antigens show little homology with known OspA&#39;s and are therefore useful as vaccine and diagnostic reagents. Multicomponent vaccines based on OspA&#39;s from different Borrelia groups are also disclosed.

The present invention relates to novel antigens, to methods for their production, to compositions containing them and to their use in the prevention, treatment and diagnosis of Lyme Disease in humans and other animals. In particular the present invention discloses novel serotypes/genotypes of the outer surface protein (Osp A) from the spirochete Borrelia burgdorferi, the causative agent of Lyme disease, and vaccine and diagnostic reagents based on B. burgdorferi of more than one subgroup.

Lyme disease in humans is a chronic progressive disease caused by B burgdorferi, which is transmitted to humans mainly by Ixodes ticks. The disease attacks many organs, notably the skin, heart, liver, central and peripheral nervous system, kidneys as well as the musculoskeletal system.

Lyme disease itself is the most common vector borne infection in the USA and has been reported in every continent except Antarctica.

A number of groups have isolated and proposed the major surface protein (Osp A) of B. burgdorferi, as being a potential vaccine candidate for use against Lyme disease. For example, International patent application published under WO90/04411 (SIMBICOM) discloses the cloning and expression of an Osp A protein derived from B. burgdorferi B31 and its use as a vaccine, M. M. Simon and colleagues have cloned and expressed Osp A from B. burgdorferi ZS7 (European Patent Application No. 90117943.2 published under No. 0418 827), and demonstrated its protective capacity to induce antibodies in passively immunised SCID mice (PNAS: 87 1990, 3768-3772). Flavell and colleagues (Science (1991) 250 p553-556) have cloned and expressed the gene for Osp A from B. burgdorferi, N40 and have demonstrated its protective efficacy in C3H/He mice.

All isolates of B. burgdorferi identified above appear to be closely related. However we have now identified six subgroups of B. burgdorferi by analysing 55 spirochete isolates from different geographical areas and sources with series of immunological, biochemical and molecular genetic techniques. The finding of different subgroups of B. burgdorferi isolates have important implications for both effective vaccination and diagnosis of Lyme disease. Since ELISA diagnostic assays directed against a strain of which species N40 is a member would not or only partially cross react with species from other subgroups. Equally a vaccine based on only one Osp A for example from N40 would not provide optimal protection against B. burgdorferi from a different subgroup.

The present inventors have identified five additional subgroups of B. burgdorferi based on their Southern blotting and PCR amplification of Osp A sequences, and differences in the amino acid and nucleic acid sequences themselves and also in reactivity against monoclonal antibodies to Osp A proteins.

The surprising discovery that B. burgdorferi exhibits such heterogeneity has important implications for vaccines against, and diagnostics reagents for the detection of, Lyme disease, since vaccines or diagnostic based on an Osp A from one group of B. burgdorferi may not detect or protect against infection of B. burgdorferi from a second group. Indeed the present inventors have shown that whereas protection can be afforded by anti Osp A antibodies generated by recombinant Osp A or viable or killed organisms within a group of closely related strains, no or only partial, protection is observed if challenge is made with an organism from a different group.

A first subtype having representative ZS7, B31, N40 is referred to herein as group I (alternative nomenclature refers to group I strains as group A).

A second subgroup hereinafter group II (alternatively known as group B) is herein disclosed and is exemplified by the species ZQ1. This species has been deposited at the DSM Deutsche Sammlung von Mikroorganismen Und Zellkulturen of Mascheroderweg 91B D-3300 Braunschweig on Jul. 11, 1991 and given the accession No. DSM6606. This group is distinct in a number of ways from group I.

Firstly, plasmid analysis of strain ZQ1 when compared with representatives from group I shows that ZQ1 has at least two unique plasmids of 18 and 14 Kd. Furthermore plasmid of 16 Kb found in group I strains is absent from strain ZQ1. Secondly when examined by polyacrylamide gel electrophoresis Osp A from ZQ1 has an apparent molecular weight of 32 Kd.

Thirdly various monoclonal antibodies specific for Osp A of group I, such as the antibodies designated LA2 L26 LA28 LA33 do not react with Osp A from group II. LA2 and LA26 antibody are known and have been described in European patent application No. EP0418827. The hybridoma producing LA2 has been deposited under accession No. ECACC 89 09 1302 on Sep. 13, 1989 at the European Collection of animal cell cultures, Public health laboratory services Porton Down Wiltshire SP40J9. The hybridoma producing LA26 has been deposited at the same culture collection under accession No. 9005406 on Jun. 28, 1990.

However an other monoclonal antibody, LA31.1, does react with the Osp A species of subgroups I and II suggesting common epitopes among Osp A species of different subgroups do exist.

We have also characterised Osp A DNA from group II strains by PCR amplification. Two pairs of Osp A primers were used, these being designated prOsp A1-prOsp A4 and prOsp A1-prOsp A2.

The primers have the following sequences:

    prOsp A1: 5'-GGGAATAGGT CTAATATTAG CC-3'                                       prOsp A2: 5'-TGCCTGAATT CCAAGCTGCA-3'                                          prOsp A4: 5'-GCAGTTAAAG TTCCTTCAAG AACATAGC-3'                            

and correspond to nucleotides at positions 138-160 (prOsp A1), 611-638 (prOsp A4), and 759-778 (prOsp A2), of ZS7 Osp A respectively. Total DNA of Group II, B. burgdorferi are distinguishable from that of Group I in that group II will not permit successful PCR (polymerase chain reaction) amplification when prOsp A1 and prOsp A2 are used as primers whereas total DNA from group I will permit a successful reaction. In contrast, when prOsp A1 and prOsp A4 are used as primers, then both DNA's of group I and group II will undergo polymerase chain reaction.

These results show that group II, B. burgdorferi have a different Osp A sequences to group I Osp As.

Equally, group II Osp A DNA, can be distinguished from group I Osp A DNA by Southern blotting utilising Osp A ZS7 sequence as a probe. Digesting genomic DNA of B. burgdorferi group II with the restriction enzyme Hind III shows a different banding pattern than that of group I strain.

For example a group I strain reveals two hybridisation fragments of 1.2 kb and 0.3 kb whereas a group II strain expressed two fragments of 0.9 kb and 0.4 kb.

Also, passive immunisation of SCID mice with immune sera to Osp A from group II will not protect against B. burgdorferi group I challenge.

Finally when compared to the sequence of Osp A ZS7 the DNA and amino acid sequence of ZQ1 strain Osp A Sequence ID 1 and 2 (i.e. a group II strain), demonstrates the substantial variation between a group I and group II strain at both the DNA and amino acid levels.

The surprising inability to protect against heterologous challenge means that a vaccines based on a single Osp A from a group I organism may be ineffective against infection with B. burgdorferi from group II organism and vice versa. Consequently there is a need for a vaccine which will protect against group II infection.

Accordingly there is provided DNA sequence encoding an Osp A derived from a B. burgdorferi characterised in that polymerase chain reaction amplification will take place utilising prOsp A1-A4 primers, but not prOsp A1-A2, and the invention further provides purified or isolated Osp A encoded thereby.

Preferably the Osp A of the present invention will not react with monoclonal antibody LA2 or LA26. Most preferably the Osp A of the present invention will have a relative molecular weight of 32 kDa as determined by SDS electrophoresis utilising molecular weight markers as standard.

Preferably the Osp A is derived from either ZQ1 or NE11H or other group II strain.

Preferably the protein is at least 70% pure as determined by SDS polyacrylamide gel electrophoresis, in particular at least 80% pure, and most preferably at least 95% pure. Preferably the Osp A antigen has a relative molecular weight of 32 kDa as determined by SDS polyacrylamide gel electrophoresis. Preferably the Osp A antigen will not react with the monoclonal antibody LA2.

In another aspect of the present invention there is provided a DNA sequence substantially identical to the DNA sequence encoding Osp A from ZQ1. By substantially identical it is meant a DNA sequence contains a sequence which is at least 85% identical and preferably 90% identical to the ZQ1 Osp A sequence depicted in Sequence ID 1. The mature protein starts at position 17 and preferably the invention provides a DNA sequence which is at least 95% identical to the sequence encoding the mature protein as indicated in Sequence ID 2.

In an alternative embodiment there is provided an Osp A containing an amino acid sequence substantially identical to the sequence set forth in sequence ID 2. The term substantially identical in relation to the amino acid sequence means amino acid sequence which is at least 85% and preferably 90% identical to the protein sequence depicted in figure and preferably at least 85% identical to the mature protein.

The present inventors have also found utilising the same biochemical and immunological techniques other groups of B. burgdorferi unrelated to other group I or II. Two isolates characteristic of group III (or group C) are the strain designated as 19857 and 21038. Such strains, like group II, strains react under PCR conditions with prOsp A1-A2 but not with prOsp A1-A4. However they differ from group II strains when analysed by Southern blotting when utilising a ZS7 probe and restriction enzyme HindIII. Such analysis reveal hybridisation fragments of 4.0 kb and 0.5 kb. In addition they react with monoclonal antibody LA26, but not LA2.

We have now sequenced utilising PCR technology, and expressed a DNA sequence encoding an Osp A from strain 19857. The DNA and amino acid sequence are depicted in sequence ID No. 3 and 4. A comparison with sequence from other groups shows that the Osp A only has approximately 65% identity at the DNA and amino acid levels with Osp A from other subgroups.

Accordingly the present invention provides a DNA sequence encoding an Osp A protein wherein the DNA sequence is substantially identical to the DNA sequence of Sequence ID 3. In a further embodiment there is provided an Osp A protein which has an amino acid sequence substantially identical to the protein as disclosed in Sequence ID 4.

The term substantial identical as used herein with respect to the sequences depicted in sequence ID No.3 and 4 mean at least 70% identity, preferably 80-85% identity, more preferably 85-95% identical.

A fourth subgroup, group IV (or group D) of B. burgdorferi, as exemplified by a Swedish isolate ACA-1 differs from any of groups I, II or m, M. Jonsson et al.(Int. Conf. Lyme Borreliosis 1990). This group will not undergo PCR with either prOsp A1-A2 or prOsp A1-A4. Their Osp A's react with monoclonal antibody LA26 but not with LA2.

Southern blotting analysis when utilising a ZS7 probe and restriction enzyme HindIII reveal a single hybridisation fragment of about 1.7 kb.

Isolated or recombinant Osp A from group IV also form part of the present invention as do vaccine or diagnostic compositions containing them.

By utilising the same Biochemical techniques, the present inventors have identified representatives from group V and group VI. A group V isolates is known as 20047 and a representative of group VI is the strain known as S90.

Isolated Osp A from a group V and VI strain also form part of the invention.

The present invention also relates to immunogenic derivatives of the OspA from group II, group III, group IV and group V or group VI B. burgdorferi.

The term immunogenic derivative as used herein encompasses any molecule such as a truncated or hybrid protein which are immunologically reactive with antibodies generated by infection of a mammalian host with a group II, or group III or group IV, or group V or group VI, B. burgdorferi and which preferably do not react with the monoclonal antibodies designated LA2. Such derivatives may be prepared by substitution, or rearrangement of aminoacids or by chemical modifications thereof.

Immunogenic fragments of the protein, which may be useful in the preparation of subunit vaccines, may be prepared by expression of the appropriate gene fragments or by peptide synthesis, for example using the Merrifield synthesis (The Peptides, Vol 2., Academic Press, NY, page 3).

The immunogenic derivative of the invention can be a hybrid, that is, a fusion polypeptide containing additional sequences which can carry one or more epitopes for other B. burgdorferi immunogens including Osp A and/or Osp B, or other immunogens from, for example other pathogens. Alternatively, the immunogenic derivative of the invention can be fused to a carrier polypeptide such Hepatitis B surface or core antigen or to another carrier which has immunostimulating properties, as in the case of an adjuvant, or which otherwise enhances the immune response to the Osp A protein or derivative thereof, or which is useful in expressing, purifying or formulating the protein or derivative thereof.

The invention also extends to the Osp A protein or immunogenic derivative thereof when chemically conjugated to a macromolecule using a conventional linking agent such as glutaraldehyde (Geerlings et al, (1988) J. Immunol. Methods, 106, 239-244).

Particularly preferred derivatives are hybrid fusion proteins of the influenza non-structural protein NS1 and Osp A or truncated Osp A derivatives. These can advantageously be produced by recombinant DNA techniques in high yields in E. coli.

Accordingly the present invention provides an Osp A protein fused to the N terminal portion of the protein NS1 from Influenza. Preferably the Osp A portion of the fusion protein is truncated so as to remove at least the hydrophobic signal sequence. More preferably the N terminal 16 amino acids representing the signal sequence and the cysteine residue which is the first amino-acid of the mature protein of the Osp A are missing.

Preferably the NS1 part of the fusion protein comprises from 3 to 81 amino acids of the N-terminal portion of the gene. The longer the NS1 part of the fusion is preferred, since this permits higher expression levels of proteins.

These hybrid proteins of the present invention are recoverable from the soluble fraction as non aggregated protein, in contrast to the native recombinant Osp A and are expressed at a higher level. The proteins retain their ability to react with monoclonal antibodies raised against native Osp A and are capable of raising a protective immune response in laboratory animals eg mice and rabbits.

In an embodiment of the invention there is provided an NS1 Osp A fusion protein from the Osp A group, known as group I, eg an Osp A from strain ZS7 as disclosed in EP 0418 - 827, or B31 as described by Howe et al. Science 227 p645, 1985, or N40 as described by Flavell et al. Such Osp A's show significant sequence homology at both the DNA and amino acid levels and are cross protective.

In a further embodiment of the present invention there is provided an NS1-Osp A wherein the Osp A is from the group known as group II. For example the Osp from B. burgdorferi strain ZQ1 as described herein.

In a yet further embodiment of the present invention there is provided an NS1-Osp A wherein the Osp A is from the group known as group III. For example strain 19857. The invention further provides a group IV NS1-Osp A, for example wherein the Osp A is derived from the strain AcaI.

The present invention further provides a DNA sequence which encodes an NS1- Osp A fusion protein as described herein. In particular the present invention provides a DNA sequence encoding an NS1-Osp A protein and the protein itself as shown in Sequence ID Nos 5 to 12 attached herewith.

The proteins of the present invention can be produced by methods standard in the art for producing other Osp A proteins from known strains. For example, the Osp A proteins maybe produced in E. coli utilising recombinant DNA technology. In particular, the proteins may be produced as full length immature proteins or mature proteins. The proteins may also be expressed as fusion proteins, such as NS1-fusion proteins.

A DNA sequence encoding the proteins of the present invention (eg Osp A ZQ1 or Osp A 19857) can be synthesized using standard DNA synthesis techniques, such as by enzymatic ligation as described by D. M. Roberts et al in Biochemistry 1985, 24, 5090-5098, by chemical synthesis, by in vitro enzymatic polymerization, or by PCR technology utilising for example a heat stable polymerase, or by a combination of these techniques.

Enzymatic polymerisation of DNA may be carried out in vitro using a DNA polymerase such as DNA polymerase I (Klenow fragment) in an appropriate buffer containing the nucleoside triphosphates dATP, dCTP, dGTP and dTTP as required at a temperature of 10°-37° C., generally in a volume of 50 μl or less. Enzymatic ligation of DNA fragments may be carried out using a DNA ligase such as T4 DNA ligase in an appropriate buffer, such as 0.05M Tris (pH 7.4), 0.01M MgCl₂, 0.01M dithiothreitol, 1 mM spermidine, 1 mM ATP and 0.1 mg/ml bovine serum albumin, at a temperature of 4° C. to ambient, generally in a volume of 50 ml or less. The chemical synthesis of the DNA polymer or fragments may be carried out by conventional phosphotriester, phosphite or phosphoramidite chemistry, using solid phase techniques such as those described in `Chemical and Enzymatic Synthesis of Gene Fragments--A Laboratory Manual` (ed. H. G. Gassen and A. Lang), Verlag Chemie, Weinheim (1982),or in other scientific publications, for example M. J. Gait, H. W. D. Matthes, M. Singh, B. S. Sproat, and R. C. Titmas, Nucleic Acids Research, 1982, 10, 6243; B. S. Sproat and W. Bannwarth, Tetrahedron Letters, 1983, 24, 5771; M. D. Matteucci and M. H. Caruthers, Tetrahedron Letters, 1980, 21, 719; M. D. Matteucci and M. H. Caruthers, Journal of the American Chemical Society, 1981, 103, 3185; S. P. Adams et al., Journal of the American Chemical Society,1983, 105, 661; N. D. Sinha, J. Biernat, J. McMannus, and H. Koester, Nucleic Acids Research, 1984, 12, 4539; and H. W. D. Matthes et al., EMBO Journal, 1984, 3, 801.

Alternatively, the coding sequence can be derived from B. burgdorferi mRNA, using known techniques (e.g. reverse transcription of mRNA to generate a complementary cDNA strand), and commercially available cDNA kits.

DNA polymers which encode mutants of the Osp A proteins may be prepared by site-directed mutagenesis of the cDNA which codes for the protein by conventional methods such as those described by G. Winter et al in Nature 1982, 299, 756-758 or by Zoller and Smith 1982; Nucl. Acids Res., 10, 6487-6500, or deletion mutagenesis such as described by Chan and Smith in Nucl. Acids Res., 1984, 12, 2407-2419 or by G. Winter et al in Biochem. Soc. Trans., 1984, 12, 224-225.

The process of the invention may be performed by conventional recombinant techniques such as described in Maniatis et. al., Molecular Cloning--A Laboratory Manual; Cold Spring Harbor, 1982-1989.

In particular, the process may comprise the steps of:

i) preparing a replicable or integrating expression vector capable, in a host cell, of expressing a DNA polymer comprising a nucleotide sequence that encodes the protein or an immunogenic derivative thereof;

ii) transforming a host cell with said vector;

iii) culturing said transformed host cell under conditions permitting expression of said DNA polymer to produce said protein; and

iv) recovering said protein.

The term `transforming` is used herein to mean the introduction of foreign DNA into a host cell. This can be achieved for example by transformation, transfection or infection with an appropriate plasmid or viral vector using e.g. conventional techniques as described in Genetic Engineering; Eds. S. M. Kingsman and A. J. Kingsman; Blackwell Scientific Publications; Oxford, England, 1988. The term `transformed` or `transformant` will hereafter apply to the resulting host cell containing and expressing the foreign gene of interest.

The expression vectors are novel and also form part of the invention.

The replicable expression vectors may be prepared in accordance with the invention, by cleaving a vector compatible with the host cell to provide a linear DNA segment having an intact replicon, and combining said linear segment with one or more DNA molecules which, together with said linear segment encode the desired product, such as the DNA polymer encoding the Osp A protein, or derivative thereof, such as an NS1 Osp A-fusion protein under ligating conditions.

Thus, the DNA polymer may be preformed or formed during the construction of the vector, as desired.

The choice of vector will be determined in part by the host cell, which may be prokaryotic or eukaryotic. Suitable vectors include plasmids, bacteriophages, cosmids and recombinant viruses.

The preparation of the replicable expression vector may be carried out conventionally with appropriate enzymes for restriction, polymerisation and ligation of the DNA, by procedures described in, for example, Maniatis et al cited above.

The recombinant host cell is prepared, in accordance with the invention, by transforming a host cell with a replicable expression vector of the invention under transforming conditions. Suitable transforming conditions are conventional and are described in, for example, Maniatis et al cited above, or "DNA Cloning" Vol. II, D. M. Glover ed., IRL Press Ltd, 1985.

The choice of transforming conditions is determined by the host cell. Thus, a bacterial host such as E. coli may be treated with a solution of CaCl₂ (Cohen et al, Proc. Nat. Acad. Sci., 1973, 69, 2110) or with a solution comprising a mixture of RbCl, MnCl₂, potassium acetate and glycerol, and then with 3-[N-morpholino]-propane-sulphonic acid, RbCl and glycerol. Mammalian cells in culture may be transformed by calcium co-precipitation of the vector DNA onto the cells. The invention also extends to a host cell transformed with a replicable expression vector of the invention.

Culturing the transformed host cell under conditions permitting expression of the DNA polymer is carried out conventionally, as described in, for example, Maniatis et al and "DNA Cloning" cited above. Thus, preferably the cell is supplied with nutrient and cultured at a temperature below 50° C.

The product is recovered by conventional methods according to the host cell. Thus, where the host cell is bacterial, such as E. coli it may be lysed physically, chemically or enzymatically and the protein product isolated from the resulting lysate. Where the host cell is mammalian, the product may generally be isolated from the nutrient medium or from cell free extracts. Conventional protein isolation techniques include selective precipitation, adsorption chromatography, and affinity chromatography including a monoclonal antibody affinity column.

The proteins of the present invention when expressed in E. coli as full length proteins produce lipoprotein micelles which are immunogenic. Such full length lipoproteins form part of the present invention.

It will be appreciated that all the proteins of the present invention may find utility in vaccine and diagnostic applications.

Furthermore, it will be appreciated that other antigenic components such as other Osp A antigens or Osp B from B. burgdorferi isolates or antigens from other pathogens may be included in a vaccine composition of the present invention. Additionally other antigens from other organisms may be present in the vaccine.

The Osp A antigens utilised in the compositions of the present invention include immunogenic fragments of Osp A, i.e. fragments of Osp A containing immunogenic B or T-cell epitopes, or fusion proteins containing such epitopes, including fusions of Osp A's from different groups.

In an aspect of the present invention there is provided a vaccine or diagnostic composition comprising an Osp A or derivative thereof from a subgroup II strain. In particular one characterised in that it is encoded by a DNA sequence which will permit successful polymerase chain reaction to take place utilising prOsp A1-A4 primers, but not prOsp A1-A2, the protein being in admixture with suitable excipient or carrier. More particularly there is provided a composition comprising an Osp A or derivative thereof from a group II strain having an amino acid sequence substantially identical to the protein sequence depicted in sequence ID No.2.

Such compositions may advantageously also contain an Osp A derivative from a subgroup I strain.

Accordingly the present provides in a preferred embodiment a composition, preferably a vaccine composition comprising an Osp A antigen derived from a subgroup I B. burgdorferi, and an Osp A antigen from a subgroup II, B. burgdorferi.

Preferably the Osp A antigen from group I are selected from group, B31, ZS7 and N40.

Preferably the Osp A antigen from group II is selected from the group ZQ1, NE11H.

The present invention also provides a vaccine or diagnostic composition comprising an OspA or derivative from a subgroup III strain, the protein being a admixture with a suitable excipient or carrier. More particularly the vaccine or diagnostic composition comprises an OspA or derivative thereof having an amino acid sequence substantially identical to the protein sequence depicted in sequence ID No.4.

Preferably the OspA is derived from strain 19857.

The invention also provides a vaccine or diagnostic composition comprising an Osp A or derivative from subgroup IV, V or VI.

In a preferred embodiment there is provided a combination vaccine comprising at least two OspA's or derivatives thereof from different B. burgdorferi subgroups. Such vaccine compositions provide protection from a wider range of Borrelia infections than hitherto. Preferably the vaccine comprises an Osp A from each of groups I to IV and most preferably an Osp A from each of group I to VI.

In the vaccine of the invention, an aqueous solution of the protein(s) can be used directly. Alternatively, the protein, with or without prior lyophilization, can be mixed or absorbed with any of the various known adjuvants. Such adjuvants include, but are not limited to, aluminium hydroxide, muramyl dipeptide and saponins such as Quil A. Particularly preferred adjuvants are, MPL (monophosphoryl lipid A) and 3D-MPL (3Deacylated monophosphoryl lipid A). A further preferred adjuvant is known as QS21. 3 DMPL can be obtained by the methods disclosed in UK patent No. 2220211, whereas QS21 can be obtained by the method disclosed in U.S. Pat. No. 5,057,540. As a further exemplary alternative, the proteins can be encapsulated within microparticles such as liposomes or associated with oil in water emulsions. In yet another exemplary alternative, the proteins can be conjugated to an immuostimulating macromolecule, such as killed Bordetella or a tetanus toxoid.

The proteins of the present invention may be expressed by live vectors such as BCG, Listeria or Salmonella and formulated as live vaccines using such vectors.

Vaccine preparation is generally described in New Trends and Developments in Vaccines, Voller et al. (eds.), University Park Press, Baltimore, Md., 1978. Encapsulation within liposomes is described by Fullerton, U.S. Pat. No. 4,235,877. Conjugation of proteins to macromolecules is disclosed, for example, by Likhite, U.S. Pat. No. 4,372,945 and Armor et al., U.S. Pat. No. 4,474,757.

Use of Quil A is disclosed by Dalsgaard et al., Acta Vet Scand, 18:349 (1977). Use of 3D-MPL is described by Ribi et al. Microbiology (1986) LEVIE et al. (Eds) American Soc. for Microbiol. Wash. D.C. pp 9-13.

The amount of the protein of the present invention present in each vaccine dose is selected as an amount which induces an immunoprotective response without significant, adverse side effects in typical vaccines. Such amount will vary depending upon which specific immunogen is employed and whether or not the vaccine is adjuvanted. Generally, it is expected that each dose will comprise 1-1000 μg of protein, preferably 1-200 μg. An optimal amount for a particular vaccine can be ascertained by standard studies involving observation of antibody titres and other responses in subjects. Following an initial vaccination, subjects may receive an additional administration to enhance their immune response.

BRIEF DESCRIPTION OF THE DRAWING

FIG. 1 outlines the construction of three plasmids pOA-10, pOA-12 and pOA-18 used for expression of NS1-OspA fusion proteins.

EXAMPLE 1

Characteristics of Borrelia burgdorferi strain ZQ1

1.1. Isolation: Midgut sample of a female Ixodes ricinus captured in Freiburg-Kappel from a dog on May 31, 1988; grown in BSK supplemented with Kanamycin and Fluoruracil; culture became positive on Jun. 8, 1988; aliquots were frozen at -70° C. and in liquid nitrogen on Jun. 20, 1988.

In vitro passages usually used for experiments second and third of B. burgdorferi are used.

1.2 Cultivation: Borrelia burgdorferi strain ZQ1 is grown in Barbour-Stoenner-Kelly's medium as described for strain ZS7 (Schailble et al., J.Exp.Med. 170. 1989;). The generation time is around 30 to 40 hours (slower than strain ZS7; around 20-24 hours).

1.3 Plasmids: Plasmid analysis was done in parallel for strain ZQ1, ZS7, Z37, GeHo, and B31 according to the protocol of Barbour and Garon (1977): Plasmids with a molecular weight of 49, 29, 25, 20, 18 Kb and a faint band at 14 Kb are found in strain ZQ1. The 49 and 25 Kb plasmids are also present in B31, Z37, GeHo and ZS7, whereas the 29 and 20 Kb plasmids are only detectable in ZS7. The 18 and 14 Kb plasmids seem to be unique to ZQ1. The 16 Kb plasmid which is found in the other strains tested is lacking in ZQ1.

1.4 Polyacrylamide gel electrophoresis: There is a distinct pattern of proteins in strain ZQ1 when compared to other strains as revealed by polyacrylamide gel electrophoresis and silverstaining; there is no band in the range of 34 kDa (Osp B); the band most probably representing Osp A has a molecular weight of around 32 kDa. The corresponding band in the other strains (ZS7, Z37, GeHo, B31) migrates at 31 kDa.

1.5 Western Blot analysis: monoclonal antibodies (mAbs) to Borrelia burgdorferi (B31, GeHo) were used, ZQ1 shows a staining pattern distinct to that of the strains ZS7 and B31; there is no staining with any of the Osp A specific mAbs with the exception of the Osp A specific mAb LA-31.1 which reacts with a corresponding band of molecular mass range around 32 kDa. None of the mAbs specific for Osp B of B31, ZS7 react with a protein of ZQ1. There is also no staining with the mAb LA.7 to a 20 kDa antigen. mAbs specific for the 65 kDa and the 70 kDa antigens stain structures in ZQ1 corresponding to those in other strains.

Immune Sera

The ZQ1 derived 32 kDa protein (Osp A) is recognized by rabbit Immune sera (IS) to Borrelia burgdorferi B31, mouse IS to Borrelia burgdorferi B1 and mouse IS Borrelia burgdorferi ZS7. There is no staining in the range of 34 kDa, IS to Borrelia burgdorferi ZQ1 reacts with Osp A, flagellin and a 20 (faint band), 50 and 65 (faint band) kDa band but not with Osp B of strain ZS7.

EXAMPLE 2

2.1 DNA Preparation and PCR Amplification

B. burgdorferi cells are lysed using the detergent SDS and proteins are removed by digestion with the nonspecific serine protease, proteinase K. Cell wall debris, polysaccharides, and remaining proteins are removed by selective precipitation with CTAB (cetyltrimethylammonium bromide), and DNA is recovered from the resulting supernatant by isopropanol precipitation. Briefly, spirochetes (10¹⁰ cells) are washed in PBS and suspended in 9 ml TE. After addition of 1 ml SDS (20%) and 50 μl proteinase K (20 mg/ml), the solution was incubated for 1 hr at 37° C. Finally, 1.5 ml 5M NaCl and 1.25 ml CTAB (20% in 0.7 M NaCl) were added and the mixture was kept for 10 min. at 65° C. DNA was purified by phenol and chloroform/isoamylalcohol extration and subsequently precipitated with 0.6 vol. isopropanol for 10 min. at room temperature. The pellet was washed using 70% ethanol, dried and dissolved in TE. (10 mM Tris 0.1 mol EDTA pH 7.4).

Oligonucleotide primers for the polymerase chain reaction were chemically synthesized by using an Applied Biosystems (ABI) DNA synthesizer and b-cyanoethyl chemistry. The following sequences of oligonucleotides were used throughout the experiments:

    prOsp A1: 5'-GGGAATAGGT CTAATATTAG CC-3';                                      prOsp A2: 5'-TGACCTGAATT CCAAGCTGCA-3';                                        prOsp A4: 5'-GCAGTTAAAG TTCCTTCAAG AACATAGC-3'.                           

Taq DNA polymerase and PCR reagents (Perkin Elmer-Cetus, Norwalk, Conn.) were used per 50 μl reaction. Each polymerase chain reaction contained 800 mM deoxynucleoside triphosphate, 2 U Taq DNA polymerase, 1.5 mM MgCl₂, and 0.5 mM of each primer. Routinely, 10 ng of total genomic B. burgdorferi DNA was amplified for 35 cycles under the following conditions: 94° C. for 1.2 min; 42° C. for 2 min; 72° C. for 2 min. A total of 10 μl per reaction was analysed on 1.5% agarose gels under standard electrophoresis conditions.

2.2 Southern Analysis

Total genomic B. burgdorferi DNA (20 μg), was digested with restriction enzymes as indicated, separated by electrophoresis on a 0.8% agarose gel, and transferred to nylon membrane (Hybond-N, Amersham). Blots were hybridized at 60° C. in Church-buffer (0.5M Na HPO₄ 17% NaDodSO₄, PH 7.2) over night with an Osp A (strain ZS7) probe labelled with ³² P by random primer extension and washed at 55° C. in 0.1×SSC/0.1% SDS.

Results

Table 1: Genotypical and phenotypical analyses of B. burgdorferi strains as analysed by PCR, and Southern blotting are shown in Table I.

Restriction Fragment Length Polymorphism of the Plasmid Encoded Osp A Gene

RFPL for Osp A using HindIII revealed at least six distinct hybridization patterns among the B. burgdorferi isolates tested. All of the B. burgdorferi strains tentatively termed as group A,A,A (for a fla, HSP60, HSP70) are characterized by two hybridization fragments of 1.2 kb and 0.3 kb (B31, ZS7; Osp A type I) and the majority of group B,B,B (for fla, HSP60, HSP70) strains (17/25) expressed two fragments of 0.9 kb and 0.4 kb (ZQ1; Osp A type II). B. burgdorferi strains 19857 and 21038 (group II,A/BA for fla, HSP60, HSP70) exhibited two hybridizing fragments of 4 kb and 0.5 kb (Osp A genotype III) and all ACA-1 like strains (group II,BA) express only one fragment of about 1.7 kb (Osp A type IV). Strains 20047 and S90 (group II,B,B) exhibit one fragment of 3 kb (Osp A type V) and 1.1 kb (Osp A type VI), respectively (Tables 1). DNAs' isolated from members of other species of Borrelia did not hybridize to the Osp A-specific probe. The frequencies of the individual OspA genotypes among B. burgdorferi isolates tested are: 30/55 (55%) Osp A type I. 17/55 (31%) type II, 2/55 (4%) type III, 4/55 (7%) type IV, 1/55 (2%) type V and 1/55 (2%) type VI. Note that American B. burgdorferi isolates analysed to this end belong to only one Osp A genotype, i.e. type I, with the exception of two strains, 19857 and 21038, which express Osp A genotype III; in contrast, among European isolates five Osp A genotypes, i.e. I, II, IV, V and VI are found. The results are summarised in table IV.

EXAMPLE 3

Pathogenicity: Inoculation of scid mice with 10⁸ ZQ1 subcutaneously in the tail leads to clinical arthritis around day 50 post inoculation. Histopathological alterations in the joints investigated at day 57 were comparable to those described for scid mice infected with strain ZS7 in earlier stages of the disease. ZQ1 is therefore less pathogenic than ZS7. Spirochetes could be isolated at day 57 post inoculation from scid mice infected with ZQ1.

When 5 C57BL/6 mice were inoculated with 10⁸ B.b. ZQ1 subcutaneously in the tail, only one mouse developed unilateral clinical arthritis at day 71 post inoculation within the entire observation period of 160 days.

EXAMPLE 4

Crossprotection: Reconstitution of scid mice with IS to ZQ1 (32 μg specific Ig/ml; 100 μl at days 0 and 4, 200 ml at days 7 and 11 and 300 μl at days 15 and 19) did not protect these mice against a challenge with ZS7 given at day 0.

EXAMPLE 5

Further crossprotection studies were carried out utilising strain the Group II strain NE11H and the group I ZS7. Transfer of immune sera into SCID mice as shown in Table II only protected against homologous challenge (i.e. challenge within the same group).

EXAMPLE 6

Crossprotection experiments using isolates or to immune sera to either various B. burgdorferi isolates or to rec.Osp A of strain ZS7

Materials and Methods

Methods

Mice (C57BL/6 or DBA/2) were inoculated with 1×10⁸ viable B. burgdorferi spirochetes of the strains ZS7 (IS anti-ZS7), ZQ1 (IS anti-ZQ1), NE11H (IS anti-NE11H), B31 (IS anti-B31) or a mixture containing equal amounts of strains 20047, ZS7, NE11H, 21305, 21038, 21343, 26816, 28691 and 19535 (IS anti-cocktail) subcutaneously (sc) into the basis of the tail.

Rec.Osp A from strain ZS7 was expressed from the pUEX1 expression vector in Escherichia coli, the proteins were extracted and affinity purified using an Osp A specific mab (LA-2). Mice were primed s.c. and boosted after 10 and 20 days with 10 μg rec. Osp A in adjuvant (ABM2; Sebac, Aidenbach, FRG).

Immune sera (IS) were obtained from these mice by several bleedings between week three and ten post inoculation (p.i.). SCID mice were injected intraperitoneally (i.p.) with IS either once (60 μg B. burgdorferi specific Ig; IS anti-ZS7, IS anti-NE11H, IS anti-cocktail, IS anti rec. Osp A) one hour before inoculation or six times for three weeks (IS anti-B31 containing 60 μg/ml specific Ig; IS anti-ZQ1 containing 32 μg/ml) with increasing amounts of antibodies (100 μl day 1 and 4, 200 μl day 7 and 11,300 μl day 14 and 17 p.i.). SCID mice were inoculated with 1×10⁸ viable B. burgdorferi spirochetes of the strains ZS7, SH-2-82-P5, 21038, NE11H or 20047 s.c. into the base of the tail one hour after the (first) transfer of serum.

Results

Immune sera to subgroup I strains ZS7 and B31 protect against homologous challenge, only partially against heterologous challenge with strain 20047 (subgroup V) and not at all against heterologous challenge with subgroup II strain NE11H. Immune sera to group II strain NE11H only partially protects against heterologous challenge with strain 20047 (subgroup V) and not at all against heterologous challenge with strain ZS7 (subgroup I).

Pretreatment of SCID mice with monospecific anti-rec. Osp A (ZS7) IS resulted in protection against development of disease when challenged with either strain ZS7 (2/6) or SH-2-82-P5 (2/3; flaA, OspA/OspB I) and in partial protection when challenged with 20047 (1/3; flab, Osp A/Osp B V) or 21038 (2/3; fla B, Osp A/Osp B III; Table 2). The clinical arthritis observed in the majority of these mice under these conditions was only mild. In contrast, SCID mice treated with the same IS to rec. Osp A but subsequently challenged with NE11H (fla B, Osp A/Osp B II) were not protected at all. All of these mice developed clinical arthritis (3/3) comparable to that seen in infected and otherwise untreated SCID mice (Table 3).

EXAMPLE 7

Construction of Expression Plasmids Encoding NS1-OspA (ZS7) Fusion

FIG. 1 outlines the construction of the three plasmids pOA-10, POA-12 and pOA-18.

Briefly, pOA-10 was created in three steps. First, a 1.1 kb NspH 1 fragment of pZS7-2 (Dr Wallich) containing the truncated OspA 'gene was ligated, after trimming of the protruding ends, with pUC19 linearized with Sma 1. In the resulting plasmid, named pOA-5, the OspA gene is flanked by various unique restriction sites,(in 5' end these are Hind III, Sph I, Pst I Sal I, Xba and BamH I and in the 3' end Sac 1 and EcoR I) making easier its subcloning. Secondly, pOA-5 was linearized by Xba I and ligated with pMG42 linearized by BamH I, after fill-in of the ends of both fragments to create pOA-9. The portion of this plasmid derived from pUC 19 has subsequently been removed by an Nco I digestion, generating pOA-10. In this plasmid, the truncated OspA gene is in frame with the first codon of NS1. The junction at the 5' end of the insert has been verified by sequencing. To create pOA-12 and pOA-18, we generated Nco I and Xba I restriction sites respectively at the 5' and the 3' ends of the DNA fragment coding for the truncated OspA gene using polymerase chain reaction (PCR). After digestion with Nco I and Xba I, this fragment was ligated with pMG42 or TCM67 digested with the same enzymes to obtain respectively pOA-12 and pOA-18. The first plasmid pOA-12, expresses the truncated OspA gene fused to the first 42 amino acids, the latter, pOA-18, to the first 81 amino acids of NS1. The insert of both plasmids have been sequenced to verify that no amino acid substitution has been introduced in OspA gene during the PCR.

All three plasmids have been transformed into E. coli AR120 which allows the induction the λpL promoter by the addition of nalidixic acid. Additionally all three plasmids have been transformed into E. coli AR58 which allows induction of the λpL promoter by an increase in temperature.

EXAMPLE 8

Expression of Recombinant trOspA from pOA-10, pOA-12 and POA-18

Fifty ml cultures (LB medium supplemented with the appropriate antibiotics) of the three strains AR120 (pOA-10), AR120 (pOA-12) and AR120 (pOA-18) were inoculated with 0.25 ml of an overnight preculture and grown at 37° C. At an A₆₂₀ of about 0.3, the cells contained in 5 ml of culture have been harvested and resuspended in SDS sample buffer. Nalidixic acid has been added to the remaining culture to a final concentration of 60 mg/ml. Three hours later the cells from the 5 ml cultures were harvested and resuspended in SDS sample buffer.

In parallel to the three AR120 strains, JM109 and JM109 (pZS7-2) strains have been grown in 50 ml of LB medium up to an optical density (620 nm) of 0.6 and treated as described above. In JM109(pZS7-2), the native form of OspA is expressed constitutively from its own promoter. All samples were submitted to SDS-PAGE and Western blot analysis using a pool of the mAbs LA-2, LA-26, and LA-31 to detect the OspA derivatives.

Analysis of samples corresponding to uninduced and induced cells (in the case of pZS7-2, host without and with the plasmid), were carried out. The amount of material loaded into each well was standarized on the basis of the optical density of the cultures (0.05 A₆₂₀ /well). On the stained gel, in the lane induced of JM109(pZS7-2) and of induced AR120(pOA-18), new bands appear which migrations are consistent with the expected size of the products to be expressed (respectively native OspA and trOspA fused to 81 amino acids of NS1). Native OspA appears as a doublet and it represents a few percents of the total protein content of the bacteria. The product of pOA-18 is expressed at higher level than the native protein. The Western blot analysis confirms that these new bands correspond to OspA derivatives. The blot further shows that AR120(pOA-12) expresses trOspA fused with 42 amino acids of NS1 but at a lower level. The expression of trOspA from pOA-10 appears as a faint band, corresponding to the expected size of trOspA and was observed on Western blot.

Similar results have been observed when the same plasmids are introduced into E. coli AR58 and the expression of the Osp A gene derivative induced by an increase of temperature. Also we have obtained similar NS1₁₋₈₁ Osp A ZS7 fusion protein utilising a kanamycin resistance encoding plasmid.

EXAMPLE 9

Comparison of Cells Fractionation of AR120(pOA18) and JM109(pZS7-2)

E. coli strain AR120(pOA18) was grown, and the expression of the Osp A genes induced as described above.

E. coli strain JM109(pZS7-2), in which the native gene of Osp A is expressed constitutively from its own promoter, has been grown in 50 ml of LB medium supplemented with 100 μg/ml of ampicillin up to an optical density (620 nm) of 0.6.

The cells of both strains were then treated as follows. The cells contained in 5 ml have been harvested by centrifugation and resuspended in SDS-PAGE sample buffer (sample T3). The cells in the remaining 40 ml were harvested, washed twice in buffer A (Tris-HCl 50 mM, pH 7.5) and disrupted in the same buffer by two passages at 10,000 lb/in² through a French pressure cell. Cell homogenates were fractionated by centrifugation. The supernatants were stored at -20° C. (samples D3). The pellets were washed twice in buffer A and solubilized overnight in SDS-PAGE sample buffer at room temperature (sample C3). Results of the cell fractionation of the 2 expressing strains were analyzed by SDS-PAGE and Western blot was conducted as above except that only 0.025 A₆₂₀ Of "cell-equivalent" was loaded into each well. The native OspA, expressed in JM109(pZS7-2), is found in both the soluble (S3) and the insoluble (C3) cellular fractions. The lower band of the doublet is found preferentially in the insoluble fraction, while the upper band is almost entirely in the soluble fraction. The high molecular weight protein that appear only in the C3 lane of JM109(pZS7-2) is not recognized by the anti-OspA antibodies and is thus probably not OspA-derived. On the other hand the product of pOA-18 is found almost exclusively in the soluble fraction.

EXAMPLE 10

Reactivity of NSI-OspA from pOA-18 with 4 anti-OspA mAbs

Crude cell extracts pf AR120 (pOA18) and JM109(pZS7-2) were prepared as described above. They were submitted to SDS-PAGE in four series of side by side wells (AR120(pOA-18) and JM109(pZS7-2)) and their proteins transferred onto a nitrocellulose membrane. The membrane were then cut in four fragments each containing a pair of side by side lanes. Each fragment was submitted to a Western blot analysis with a different anti-Osp A mAb. The results indicate that the NSI-Osp A encoded by pOA-18 and the native Osp A react with all four monoclonals in a similar fashion.

EXAMPLE 11

In an analogous fashion to the construction of pOA-18, plasmids were constructed to express NS1-OspA fusions proteins from other B. burgdorferi strain. In particular the following fusion from the following strains were made and tested as noted above: NS1-OspA (ZQ1); NS1-OspA (AcaI) and NS1-OspA (19857).

Summary and Conclusions

A recombinant truncated form of OspA, lacking the 16 first amino acids of the native protein and fused to the first 81 amino acids of NS1, is expressed at a higher level than the native OspA. It is more soluble than the native protein and retains the reactivity with those monoclonal antibodies binding to the respective native Osp A is immunogenic when applied with adjuvants and has the ability to protect animals from challenge with virulent B. burgdorferi.

                                      TABLE I                                      __________________________________________________________________________                           PCR         Southern I                                                         aa 6-170                                                                             aa 6-220                                                                             Hind III*                                    Strain                                                                               Origin                                                                               Source    Osp A1-A4                                                                            Osp A1-A2                                                                            Osp A ( )                                    __________________________________________________________________________     B31   USA   Ixodes dammini                                                                           +     +     I (A)                                        ZS7   Germany                                                                              I. ricinus                                                                               +     +     I (A)                                        Z37   Germany                                                                              I. ricinus                                                                               +     +     I (A)                                        GeHo  Germany                                                                              Skin (ECM)                                                                               +     +     I (A)                                        B1    Germany                                                                              Human Skin Biopsy                                                                        +     +     I (A)                                        B2    Germany                                                                              Human Skin Biopsy                                                                        +     +     I (A)                                        B3    Germany                                                                              Human Skin Biopsy                                                                        +     +     I (A)                                        20004 France                                                                               I. ricinus                                                                               +     +     I (A)                                        19535 USA   Peromyscus leucopus                                                                      +     +     I (A)                                        26816 USA   Microtus+ +     +     I (A)                                        28691 USA   I. dammini                                                                               +     +     I (A)                                        21305 USA   Peromysous leucopus                                                                      +     +     I (A)                                        21343 USA   Peromysous leucopus                                                                      +     +     I (A)                                        26815 USA   Chipmunk  +     +     I (A)                                        R7NE4 Switzerland                                                                          I. ricinus                                                                               +     +     I (A)                                        297   USA   Human/Spinal fluid                                                                       +     +     I (A)                                        MAC3  USA   Human     +     +     I (A)                                        20001 France                                                                               I. ricinus                                                                               +     +     I (A)                                        CT1P7 USA   Tick Isolate/dog                                                                         +     +     I (A)                                        SH-2-82-P5                                                                           USA   I. dammini                                                                               +     +     I (A)                                        CA-2-87                                                                              USA   I. pacificus                                                                             n.d.  n.d.  I (A)                                        S12/14                                                                               Germany                                                                              I. ricinus                                                                               +     +     I (A)                                        19857 USA   Rabbit Kidney                                                                            +     -     III (C)                                      ZQ1   Germany                                                                              I. ricinus                                                                               +     -     II (B)                                       __________________________________________________________________________                           PCR         Southern                                                           aa 6-170                                                                             aa 6-220                                                                             Hind III                                     Strain                                                                               Origin                                                                               Source    Osp A1-A4                                                                            Osp A1-A2                                                                            Osp A                                        __________________________________________________________________________     NE4   Switzerland                                                                          I. ricinus                                                                               +     -     II (B)                                       NE58  Switzerland                                                                          I. ricinus                                                                               +     -     II (B)                                       NE11H Switzerland                                                                          I. ricinus                                                                               +     n.d.  II (B)                                       R7NE58                                                                               Switzerland                                                                          I. ricinus                                                                               +     n.d.  II (B)                                       20047 France                                                                               I. ricinus                                                                               +     -     II (B)                                       N34   Germany                                                                              I. ricinus                                                                               +     -     II (B)                                       21038 USA   I. dentatus                                                                              +     -     III (C)                                      ACA-1 Sweden                                                                               Human skin                                                                               -     -     IV (D)                                       20047 France                                                                               I. ricinus                                                                               n.d.  n.d.  V (E)                                        S90   Germany                                                                              I. ricinus                                                                               n.d.  n.d.  VI (F)                                       __________________________________________________________________________      *alternative nomenclature                                                      I Osp A genotype                                                         

                  TABLE II                                                         ______________________________________                                         Crossprotection                                                                immune serum                                                                   transferred     strain   protection                                            anti-           inoculated                                                                              (no arthritis)                                        ______________________________________                                         ZS7             ZS7      +                                                     ZS7             NE11H    -                                                     NE11H           NE11H    +                                                     NE11H           ZS7      -                                                     NE11H           20047°                                                                           ±                                                  NE11H           19857°                                                                           ±                                                  ZS7             20047°                                                                           ±                                                  IS cocktail*    19857°                                                                           +                                                     IS cocktail*    19857°                                                                           ±                                                  ______________________________________                                          *including 20047, ZS7 and NE11H;                                               °strains showed reduced pathogenicity in unprotected controls.    

                  TABLE III                                                        ______________________________________                                         Crossprotection                                                                immune serum        clinical  protection                                       transferred                                                                              strain    arthritis histo-  spiro-                                   anti-     inoculated                                                                               d23-25 p.i.                                                                              pathology+                                                                             chetemia§                           ______________________________________                                         --        ZS7       8/8       +       5/7                                      ZS7       ZS7       0/3       -       0/3                                      ZS7       NE11H     3/3       +       3/3                                      ZS7       20047     (2/3)°                                                                            ±    3/3                                      B31       ZS7       0/3       -       3/3                                      --        NE11H     7/7       +       4/5                                      NE11H     NE11H     (2/6)°                                                                            -       0/6                                      NE11H     ZS7       3/3       +       3/3                                      NE11H     20047     (2/3)°                                                                            ±    1/3                                      ZQ1       ZS7       3/3       +       3/3                                                20047     4/4       +       2/3                                      IS cocktail*                                                                             20047     0/3       -       1/3                                      rec.OspA (ZS7)                                                                           ZS7       (2/6)°                                                                            -       5/6                                      rec.OspA (ZS7)                                                                           NE11H     3/3       +       2/3                                      rec.OspA(ZS7)                                                                            20047     (1/3)°                                                                            ±    0/2                                      --        SH-2-82-P5                                                                               2/2       +       1/2                                      rec.OspA (ZS7)                                                                           SH-2-82-P5                                                                               (2/3)°                                                                            -       0/3                                      --        21038     (2/2)     ±     1/2++                                   rec.OspA (ZS7)                                                                           21038     (2/3)°                                                                            -       0/2                                      ______________________________________                                          Legend: Table III: Crossprotection                                             *including B. burgdoferi organisms of strains 20047, ZS7 and NE11H;            +arthritis, carditis, hepatitis, myositis                                      °only, mild clinical arthritis                                           only minor histopathological alterations                                      §recultivation                                                            ++nonmotile spirochaetes                                                 

                                      TABLE IV                                     __________________________________________________________________________     B. burgdorferi     Geographical                                                                         fla/HSP60/HSP70                                                                        OspA                                          isolate  Biological origin                                                                        origin                                                                               genogroup                                                                              genotype                                      __________________________________________________________________________     B31 (ATCC35210)                                                                         Tick (I. dammini)                                                                        USA   A/A/A   I                                             ZS7      Tick (I. ricinus)                                                                        Germany                                                                              A/A/A   I                                             Z37      Tick (I. ricinus)                                                                        Germany                                                                              A/A/A   I                                             GeHo     Skin (ECM)                                                                               Germany                                                                              A/A/A   I                                             B1       Skin (ECM)                                                                               Germany                                                                              A/A/A   I                                             B2       Skin (ECM)                                                                               Germany                                                                              A/A/A   I                                             B3       Skin (AD) Germany                                                                              A/A/A   I                                             20004    Tick (I. ricinus)                                                                        France                                                                               A/A/A   I                                             19535    Mouse (Peromyscus)                                                                       USA   A/A/A   I                                             26816    Vole (Microtus)                                                                          USA   A/A/A   I                                             28691    Tick (I. dammini)                                                                        USA   A/A/A   I                                             21305    Mouse (Peromyscus)                                                                       USA   A/A/A   I                                             21343    Mouse (Peromyscus)                                                                       USA   A/A/A   I                                             26815    Chipmunk  USA   A/A/A   I                                             297      Cerebrospinal fluid                                                                      USA   A/A/A   I                                             Mac3     Skin      USA   A/A/A   I                                             20001    Tick (I. ricinus)                                                                        France                                                                               A/A/A   I                                             CTIP7    Dog tick  USA   A/A/A   I                                             SH-2-92-P5                                                                              Tick (I. dammini)                                                                        USA   A/A/A   I                                             CA-2-87  Tick (I. pacificus)                                                                      USA   A/A/A   I                                             S12/14   Tick (I. ricinus)                                                                        Germany                                                                              A/A/A   I                                             Z25      Tick (I. ricinus)                                                                        Germany                                                                              A/A/A   I                                             Z118     Tick (I. ricinus)                                                                        Germany                                                                              A/A/A   I                                             Z136     Tick (I. ricinus)                                                                        Germany                                                                              A/A/A   I                                             Z160     Tick (I. ricinus)                                                                        Germany                                                                              A/A/A   I                                             IP1      Cerebrospinal fluid                                                                      France                                                                               A/A/A   I                                             NE2      Tick (I. ricinus)                                                                        Switzerland                                                                          A/A/A   I                                             R7NE4    Tick (I. ricinus)                                                                        Switzerland                                                                          A/A/A   I                                             LW2      Skin      Germany                                                                              A/A/A   I                                             LW2.4    Skin      Germany                                                                              A/A/A   I                                             19857    Rabbit Kindey                                                                            USA   B/A/B/A III                                           21038    Larva (I dentatus)                                                                       USA   B/A/B/A III                                           ACA-1    Skin (ACA)                                                                               Sweden                                                                               B/B/A   IV                                            Bo23     Skin (ECM)                                                                               Germany                                                                              B/B/A   IV                                            So2      Tick (I. ricinus)                                                                        Great Britain                                                                        B/B/A   IV                                            PKo      Skin (ECM)                                                                               Germany                                                                              B/B/A   IV                                            ZQ1      Tick (I. ricinus)                                                                        Germany                                                                              B/B/B   II                                            NE4      Tick (I. ricinus)                                                                        Switzerland                                                                          B/B/B   II                                            NE58     Tick (I. ricinus)                                                                        Switzerland                                                                          B/B/B   II                                            NE11H    Tick (I. ricinus)                                                                        Switzerland                                                                          B/B/B   II                                            R3NE2    Tick (I. ricinus)                                                                        Switzerland                                                                          B/B/B   II                                            N34      Tick (I. ricinus)                                                                        Germany                                                                              B/B/B   II                                            IP3      Cerebrospinal fluid                                                                      France                                                                               B/B/B   II                                            IRS Us             Germany                                                                              B/B/B   II                                            Frst1    Skin      Germany                                                                              B/B/B   II                                            Frst2    Skin      Germany                                                                              B/B/B   II                                            So1      Tick (I. ricinus)                                                                        Great Britain                                                                        B/B/B   II                                            42/87              Sweden                                                                               B/B/B   II                                            152/86             Sweden                                                                               B/B/B   II                                            MK5      Tick (I. ricinus)                                                                        Hungary                                                                              B/B/B   II                                            MK6      Tick (I. ricinus)                                                                        Hungary                                                                              B/B/B   II                                            387      Cerebrospinal fluid                                                                      Germany                                                                              B/B/B   II                                            50       Cerebrospinal fluid                                                                      Germany                                                                              B/B/B   II                                            20047    Tick (I. ricinus)                                                                        France                                                                               B/B/B   V                                             S90      Tick (I. ricinus)                                                                        Germany                                                                              B/B/B   VI                                            __________________________________________________________________________

    __________________________________________________________________________     #             SEQUENCE LISTING                                                 - (1) GENERAL INFORMATION:                                                     -    (iii) NUMBER OF SEQUENCES: 12                                             - (2) INFORMATION FOR SEQ ID NO:1:                                             -      (i) SEQUENCE CHARACTERISTICS:                                           #pairs    (A) LENGTH: 825 base                                                           (B) TYPE: nucleic acid                                                         (C) STRANDEDNESS: single                                                       (D) TOPOLOGY: linear                                                 -     (ii) MOLECULE TYPE: DNA (genomic)                                        -     (vi) ORIGINAL SOURCE:                                                    #BURGDORFERI) ORGANISM: BORRELIA                                                         (B) STRAIN: ZQ1                                                      -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:1:                                  - ATGAAAAAAT ATTTATTGGG AATAGGTCTA ATATTAGCCT TAATAGCATG TA - #AGCAAAAT          60                                                                           - GTTAGCAGCC TTGATGAAAA AAATAGCGTT TCAGTAGATT TACCTGGTGG AA - #TGAAAGTT         120                                                                           - CTTGTAAGTA AAGAAAAAGA CAAAGATGGT AAATACAGTC TAGAGGCAAC AG - #TAGACAAG         180                                                                           - CTTGAGCTTA AAGGAACTTC TGATAAAAAC AACGGTTCTG GAACACTTGA AG - #GTGAAAAA         240                                                                           - ACTGACAAAA GTAAAGTAAA ATTAACAATT GCTGAGGATC TAAGTAAAAC CA - #CATTTGAA         300                                                                           - ATTTTCAAAG AAGATGGCAA AACATTAGTA TCAAAAAAAG TAACCCTTAA AG - #ACAAGTCA         360                                                                           - TCAACAGAAG AAAAATTCAA CGAAAAGGGT GAAATATCTG AAAAAACAAT AG - #TAAGAGCA         420                                                                           - AATGGAACCA GACTTGAATA CACAGACATA AAAAGCGATG GATCCGGAAA AG - #CTAAAGAA         480                                                                           - GTTTTAAAAG ACTTTACTCT TGAAGGAACT CTAGCTGCTG ACGGCAAAAC AA - #CATTGAAA         540                                                                           - GTTACAGAAG GCACTGTTGT TTTAAGCAAG AACATTTTAA AATCCGGAGA AA - #TAACAGTT         600                                                                           - GCACTTGATG ACTCTGACAC TACTCAGGCT ACTAAAAAAA CTGGAAAATG GG - #ATTCAAAG         660                                                                           - ACTTCCACTT TAACAATTAG TGTGAATAGC CAAAAAACCA AAAACCTTGT AT - #TCACAAAA         720                                                                           - GAAGACACAA TAACAGTACA AAAATACGAC TCAGCAGGCA CCAATCTAGA AG - #GCAAAGCA         780                                                                           #                 825AA AGAACTTAAA GACGCTTTAA AATAA                            - (2) INFORMATION FOR SEQ ID NO:2:                                             -      (i) SEQUENCE CHARACTERISTICS:                                           #acids    (A) LENGTH: 274 amino                                                          (B) TYPE: amino acid                                                           (C) STRANDEDNESS: single                                                       (D) TOPOLOGY: linear                                                 -     (ii) MOLECULE TYPE: protein                                              -     (vi) ORIGINAL SOURCE:                                                    #BURGDORFERI) ORGANISM: BORRELIA                                                         (B) STRAIN: ZQ1                                                      -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:2:                                  - Met Lys Lys Tyr Leu Leu Gly Ile Gly Leu Il - #e Leu Ala Leu Ile Ala          #                15                                                            - Cys Lys Gln Asn Val Ser Ser Leu Asp Glu Ly - #s Asn Ser Val Ser Val          #            30                                                                - Asp Leu Pro Gly Gly Met Lys Val Leu Val Se - #r Lys Glu Lys Asp Lys          #        45                                                                    - Asp Gly Lys Tyr Ser Leu Glu Ala Thr Val As - #p Lys Leu Glu Leu Lys          #    60                                                                        - Gly Thr Ser Asp Lys Asn Asn Gly Ser Gly Th - #r Leu Glu Gly Glu Lys          #80                                                                            - Thr Asp Lys Ser Lys Val Lys Leu Thr Ile Al - #a Glu Asp Leu Ser Lys          #                95                                                            - Thr Thr Phe Glu Ile Phe Lys Glu Asp Gly Ly - #s Thr Leu Val Ser Lys          #           110                                                                - Lys Val Thr Leu Lys Asp Lys Ser Ser Thr Gl - #u Glu Lys Phe Asn Glu          #       125                                                                    - Lys Gly Glu Ile Ser Glu Lys Thr Ile Val Ar - #g Ala Asn Gly Thr Arg          #   140                                                                        - Leu Glu Tyr Thr Asp Ile Lys Ser Asp Gly Se - #r Gly Lys Ala Lys Glu          145                 1 - #50                 1 - #55                 1 -        #60                                                                            - Val Leu Lys Asp Phe Thr Leu Glu Gly Thr Le - #u Ala Ala Asp Gly Lys          #               175                                                            - Thr Thr Leu Lys Val Thr Glu Gly Thr Val Va - #l Leu Ser Lys Asn Ile          #           190                                                                - Leu Lys Ser Gly Glu Ile Thr Val Ala Leu As - #p Asp Ser Asp Thr Thr          #       205                                                                    - Gln Ala Thr Lys Lys Thr Gly Lys Trp Asp Se - #r Lys Thr Ser Thr Leu          #   220                                                                        - Thr Ile Ser Val Asn Ser Gln Lys Thr Lys As - #n Leu Val Phe Thr Lys          225                 2 - #30                 2 - #35                 2 -        #40                                                                            - Glu Asp Thr Ile Thr Val Gln Lys Tyr Asp Se - #r Ala Gly Thr Asn Leu          #               255                                                            - Glu Gly Lys Ala Val Glu Ile Thr Thr Leu Ly - #s Glu Leu Lys Asp Ala          #           270                                                                - Leu Lys                                                                      - (2) INFORMATION FOR SEQ ID NO:3:                                             -      (i) SEQUENCE CHARACTERISTICS:                                           #pairs    (A) LENGTH: 819 base                                                           (B) TYPE: nucleic acid                                                         (C) STRANDEDNESS: single                                                       (D) TOPOLOGY: linear                                                 -     (ii) MOLECULE TYPE: DNA (genomic)                                        -     (vi) ORIGINAL SOURCE:                                                    #BURGDORFERI) ORGANISM: BORRELIA                                                         (B) STRAIN: 19857                                                    -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:3:                                  - ATGAAAAAAT ATTTATTGGG AATAGGTCTA ATATTAGCCT TAATAGCATG TA - #AGCAAAAT          60                                                                           - GTTAGCAGCC TTGACGAGAA AAACAGCGTT TCAGTAGATG TACCTGGTGG AA - #TGAAAGTT         120                                                                           - CTTGTAAGCA AAGAAAAAAA CAAAGACGGC AAGTACGATC TAATGGCAAC AG - #TGGACAAC         180                                                                           - GTTGATCTTA AAGGAACTTC TGACAAAAAC AATGGATCTG GAATACTTGA AG - #GCGTAAAA         240                                                                           - GCTGATAAAA GTAAAGTAAA ATTAACAGTT GCTGACGATC TAAGCAAAAC CA - #CACTTGAA         300                                                                           - GTTTTAAAAG AAGATGGTAC AGTAGTGTCA AGAAAAGTAA CTTCCAAAGA CA - #AGTCAACA         360                                                                           - ACAGAAGCAA AATTCAACGA AAAAGGTGAA TTGTCTGAAA AAACAATGAC AA - #GAGCAAAC         420                                                                           - GGAACTACTC TTGAATACTC ACAAATGACA AATGAAGACA ATGCTGCAAA AG - #CAGTAGAA         480                                                                           - ACTCTTAAAA ACGGCATTAA GTTTGAAGGA AATCTCGCAA GTGGAAAAAC AG - #CAGTGGAA         540                                                                           - ATTAAAGAAG GCACTGTTAC TCTAAAAAGA GAAATTGATA AAAATGGAAA AG - #TAACCGTC         600                                                                           - TCTTTAAATG ACACTGCATC TGGTTCTAAA AAAACAGCTT CCTGGCAAGA AA - #GTACTAGC         660                                                                           - ACCTTAACAA TTAGTGCAAA CAGCAAAAAA ACTAAAGATC TAGTGTTCCT AA - #CAAACGGT         720                                                                           - ACAATTACAG TACAAAATTA TGACTCAGCT GGCACTAAAC TTGAAGGATC AG - #CAGCTGAA         780                                                                           #   819            AACT TAAAAACGCT TTAAGATAA                                   - (2) INFORMATION FOR SEQ ID NO:4:                                             -      (i) SEQUENCE CHARACTERISTICS:                                           #acids    (A) LENGTH: 272 amino                                                          (B) TYPE: amino acid                                                           (C) STRANDEDNESS: single                                                       (D) TOPOLOGY: linear                                                 -     (ii) MOLECULE TYPE: protein                                              -     (vi) ORIGINAL SOURCE:                                                    #BURGDORFERI) ORGANISM: BORRELIA                                                         (B) STRAIN: 19857                                                    -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:4:                                  - Met Lys Lys Tyr Leu Leu Gly Ile Gly Leu Il - #e Leu Ala Leu Ile Ala          #                15                                                            - Cys Lys Gln Asn Val Ser Ser Leu Asp Glu Ly - #s Asn Ser Val Ser Val          #            30                                                                - Asp Val Pro Gly Gly Met Lys Val Leu Val Se - #r Lys Glu Lys Asn Lys          #        45                                                                    - Asp Gly Lys Tyr Asp Leu Met Ala Thr Val As - #p Asn Val Asp Leu Lys          #    60                                                                        - Gly Thr Ser Asp Lys Asn Asn Gly Ser Gly Il - #e Leu Glu Gly Val Lys          #80                                                                            - Ala Asp Lys Ser Lys Val Lys Leu Thr Val Al - #a Asp Asp Leu Ser Lys          #                95                                                            - Thr Thr Leu Glu Val Leu Lys Glu Asp Gly Th - #r Val Val Ser Arg Lys          #           110                                                                - Val Thr Ser Lys Asp Lys Ser Thr Thr Glu Al - #a Lys Phe Asn Glu Lys          #       125                                                                    - Gly Glu Leu Ser Glu Lys Thr Met Thr Arg Al - #a Asn Gly Thr Thr Leu          #   140                                                                        - Glu Tyr Ser Gln Met Thr Asn Glu Asp Asn Al - #a Ala Lys Ala Val Glu          145                 1 - #50                 1 - #55                 1 -        #60                                                                            - Thr Leu Lys Asn Gly Ile Lys Phe Glu Gly As - #n Leu Ala Ser Gly Lys          #               175                                                            - Thr Ala Val Glu Ile Lys Glu Gly Thr Val Th - #r Leu Lys Arg Glu Ile          #           190                                                                - Asp Lys Asn Gly Lys Val Thr Val Ser Leu As - #n Asp Thr Ala Ser Gly          #       205                                                                    - Ser Lys Lys Thr Ala Ser Trp Gln Glu Ser Th - #r Ser Thr Leu Thr Ile          #   220                                                                        - Ser Ala Asn Ser Lys Lys Thr Lys Asp Leu Va - #l Phe Leu Thr Asn Gly          225                 2 - #30                 2 - #35                 2 -        #40                                                                            - Thr Ile Thr Val Gln Asn Tyr Asp Ser Ala Gl - #y Thr Lys Leu Glu Gly          #               255                                                            - Ser Ala Ala Glu Ile Lys Lys Leu Asp Glu Le - #u Lys Asn Ala Leu Arg          #           270                                                                - (2) INFORMATION FOR SEQ ID NO:5:                                             -      (i) SEQUENCE CHARACTERISTICS:                                           #pairs    (A) LENGTH: 1020 base                                                          (B) TYPE: nucleic acid                                                         (C) STRANDEDNESS: single                                                       (D) TOPOLOGY: linear                                                 -     (ii) MOLECULE TYPE: DNA (genomic)                                        -     (vi) ORIGINAL SOURCE:                                                    #BURGDORFERI) ORGANISM: BORRELIA                                                         (B) STRAIN: zq1                                                      -    (vii) IMMEDIATE SOURCE:                                                             (B) CLONE: NS1-ZQ1                                                   -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:5:                                  - ATGGATCCAA ACACTGTGTC AAGCTTTCAG GTAGATTCCT TTCTTTGGCA TG - #TCCGCAAA          60                                                                           - CGAGTTGCAG ACCAAGAACT AGGTGATGCC CCATTCCTTG ATCGGCTTCG CC - #GAGATCAG         120                                                                           - AAATCCCTAA GAGGAAGGGG CAGCACTCTT GGTCTGGACA TCGAGACAGC CA - #CACGTGCT         180                                                                           - GGAAAGCAGA TAGTGGAGCG GATTCTGAAA GAAGAATCCG ATGAGGCACT TA - #AAATGACC         240                                                                           - ATGGGAAAGC AAAATGTTAG CAGCCTTGAT GAAAAAAATA GCGTTTCAGT AG - #ATTTACCT         300                                                                           - GGTGGAATGA AAGTTCTTGT AAGTAAAGAA AAAGACAAAG ATGGTAAATA CA - #GTCTAGAG         360                                                                           - GCAACAGTAG ACAAGCTTGA GCTTAAAGGA ACTTCTGATA AAAACAACGG TT - #CTGGAACA         420                                                                           - CTTGAAGGTG AAAAAACTGA CAAAAGTAAA GTAAAATTAA CAATTGCTGA GG - #ATCTAAGT         480                                                                           - AAAACCACAT TTGAAATTTT CAAAGAAGAT GGCAAAACAT TAGTATCAAA AA - #AAGTAACC         540                                                                           - CTTAAAGACA AGTCATCAAC AGAAGAAAAA TTCAACGAAA AGGGTGAAAT AT - #CTGAAAAA         600                                                                           - ACAATAGTAA GAGCAAATGG AACCAGACTT GAATACACAG ACATAAAAAG CG - #ATGGATCC         660                                                                           - GGAAAAGCTA AAGAAGTTTT AAAAGACTTT ACTCTTGAAG GAACTCTAGC TG - #CTGACGGC         720                                                                           - AAAACAACAT TGAAAGTTAC AGAAGGCACT GTTGTTTTAA GCAAGAACAT TT - #TAAAATCC         780                                                                           - GGAGAAATAA CAGTTGCACT TGATGACTCT GACACTACTC AGGCTACTAA AA - #AAACTGGA         840                                                                           - AAATGGGATT CAAAGACTTC CACTTTAACA ATTAGTGTGA ATAGCCAAAA AA - #CCAAAAAC         900                                                                           - CTTGTATTCA CAAAAGAAGA CACAATAACA GTACAAAAAT ACGACTCAGC AG - #GCACCAAT         960                                                                           - CTAGAAGGCA AAGCAGTCGA AATTACAACA CTTAAAGAAC TTAAAGACGC TT - #TAAAATAA        1020                                                                           - (2) INFORMATION FOR SEQ ID NO:6:                                             -      (i) SEQUENCE CHARACTERISTICS:                                           #acids    (A) LENGTH: 339 amino                                                          (B) TYPE: amino acid                                                           (C) STRANDEDNESS: single                                                       (D) TOPOLOGY: linear                                                 -     (ii) MOLECULE TYPE: protein                                              -     (vi) ORIGINAL SOURCE:                                                    #BURGDORFERI) ORGANISM: BORRELIA                                                         (B) STRAIN: ZQ1                                                      -    (vii) IMMEDIATE SOURCE:                                                             (B) CLONE: NS1-ZQ1                                                   -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:6:                                  - Met Asp Pro Asn Thr Val Ser Ser Phe Gln Va - #l Asp Ser Phe Leu Trp          #                15                                                            - His Val Arg Lys Arg Val Ala Asp Gln Glu Le - #u Gly Asp Ala Pro Phe          #            30                                                                - Leu Asp Arg Leu Arg Arg Asp Gln Lys Ser Le - #u Arg Gly Arg Gly Ser          #        45                                                                    - Thr Leu Gly Leu Asp Ile Glu Thr Ala Thr Ar - #g Ala Gly Lys Gln Ile          #    60                                                                        - Val Glu Arg Ile Leu Lys Glu Glu Ser Asp Gl - #u Ala Leu Lys Met Thr          #80                                                                            - Met Gly Lys Gln Asn Val Ser Ser Leu Asp Gl - #u Lys Asn Ser Val Ser          #                95                                                            - Val Asp Leu Pro Gly Gly Met Lys Val Leu Va - #l Ser Lys Glu Lys Asp          #           110                                                                - Lys Asp Gly Lys Tyr Ser Leu Glu Ala Thr Va - #l Asp Lys Leu Glu Leu          #       125                                                                    - Lys Gly Thr Ser Asp Lys Asn Asn Gly Ser Gl - #y Thr Leu Glu Gly Glu          #   140                                                                        - Lys Thr Asp Lys Ser Lys Val Lys Leu Thr Il - #e Ala Glu Asp Leu Ser          145                 1 - #50                 1 - #55                 1 -        #60                                                                            - Lys Thr Thr Phe Glu Ile Phe Lys Glu Asp Gl - #y Lys Thr Leu Val Ser          #               175                                                            - Lys Lys Val Thr Leu Lys Asp Lys Ser Ser Th - #r Glu Glu Lys Phe Asn          #           190                                                                - Glu Lys Gly Glu Ile Ser Glu Lys Thr Ile Va - #l Arg Ala Asn Gly Thr          #       205                                                                    - Arg Leu Glu Tyr Thr Asp Ile Lys Ser Asp Gl - #y Ser Gly Lys Ala Lys          #   220                                                                        - Glu Val Leu Lys Asp Phe Thr Leu Glu Gly Th - #r Leu Ala Ala Asp Gly          225                 2 - #30                 2 - #35                 2 -        #40                                                                            - Lys Thr Thr Leu Lys Val Thr Glu Gly Thr Va - #l Val Leu Ser Lys Asn          #               255                                                            - Ile Leu Lys Ser Gly Glu Ile Thr Val Ala Le - #u Asp Asp Ser Asp Thr          #           270                                                                - Thr Gln Ala Thr Lys Lys Thr Gly Lys Trp As - #p Ser Lys Thr Ser Thr          #       285                                                                    - Leu Thr Ile Ser Val Asn Ser Gln Lys Thr Ly - #s Asn Leu Val Phe Thr          #   300                                                                        - Lys Glu Asp Thr Ile Thr Val Gln Lys Tyr As - #p Ser Ala Gly Thr Asn          305                 3 - #10                 3 - #15                 3 -        #20                                                                            - Leu Glu Gly Lys Ala Val Glu Ile Thr Thr Le - #u Lys Glu Leu Lys Asp          #               335                                                            - Ala Leu Lys                                                                  - (2) INFORMATION FOR SEQ ID NO:7:                                             -      (i) SEQUENCE CHARACTERISTICS:                                           #pairs    (A) LENGTH: 1014 base                                                          (B) TYPE: nucleic acid                                                         (C) STRANDEDNESS: single                                                       (D) TOPOLOGY: linear                                                 -     (ii) MOLECULE TYPE: DNA (genomic)                                        -     (vi) ORIGINAL SOURCE:                                                    #BURGDORFERI) ORGANISM: BORRELIA                                                         (B) STRAIN: 19857                                                    -    (vii) IMMEDIATE SOURCE:                                                             (B) CLONE: NS1-19857                                                 -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:7:                                  - ATGGATCCAA ACACTGTGTC AAGCTTTCAG GTAGATTCCT TTCTTTGGCA TG - #TCCGCAAA          60                                                                           - CGAGTTGCAG ACCAAGAACT AGGTGATGCC CCATTCCTTG ATCGGCTTCG CC - #GAGATCAG         120                                                                           - AAATCCCTAA GAGGAAGGGG CAGCACTCTT GGTCTGGACA TCGAGACAGC CA - #CACGTGCT         180                                                                           - GGAAAGCAGA TAGTGGAGCG GATTCTGAAA GAAGAATCCG ATGAGGCACT TA - #AAATGACC         240                                                                           - ATGGGAAAGC AAAATGTTAG CAGCCTTGAC GAGAAAAACA GCGTTTCAGT AG - #ATGTACCT         300                                                                           - GGTGGAATGA AAGTTCTTGT AAGCAAAGAA AAAAACAAAG ACGGCAAGTA CG - #ATCTAATG         360                                                                           - GCAACAGTGG ACAACGTTGA TCTTAAAGGA ACTTCTGACA AAAACAATGG AT - #CTGGAATA         420                                                                           - CTTGAAGGCG TAAAAGCTGA TAAAAGTAAA GTAAAATTAA CAGTTGCTGA CG - #ATCTAAGC         480                                                                           - AAAACCACAC TTGAAGTTTT AAAAGAAGAT GGTACAGTAG TGTCAAGAAA AG - #TAACTTCC         540                                                                           - AAAGACAAGT CAACAACAGA AGCAAAATTC AACGAAAAAG GTGAATTGTC TG - #AAAAAACA         600                                                                           - ATGACAAGAG CAAACGGAAC TACTCTTGAA TACTCACAAA TGACAAATGA AG - #ACAATGCT         660                                                                           - GCAAAAGCAG TAGAAACTCT TAAAAACGGC ATTAAGTTTG AAGGAAATCT CG - #CAAGTGGA         720                                                                           - AAAACAGCAG TGGAAATTAA AGAAGGCACT GTTACTCTAA AAAGAGAAAT TG - #ATAAAAAT         780                                                                           - GGAAAAGTAA CCGTCTCTTT AAATGACACT GCATCTGGTT CTAAAAAAAC AG - #CTTCCTGG         840                                                                           - CAAGAAAGTA CTAGCACCTT AACAATTAGT GCAAACAGCA AAAAAACTAA AG - #ATCTAGTG         900                                                                           - TTCCTAACAA ACGGTACAAT TACAGTACAA AATTATGACT CAGCTGGCAC TA - #AACTTGAA         960                                                                           - GGATCAGCAG CTGAAATTAA AAAACTCGAT GAACTTAAAA ACGCTTTAAA AT - #AA              1014                                                                           - (2) INFORMATION FOR SEQ ID NO:8:                                             -      (i) SEQUENCE CHARACTERISTICS:                                           #acids    (A) LENGTH: 337 amino                                                          (B) TYPE: amino acid                                                           (C) STRANDEDNESS: single                                                       (D) TOPOLOGY: linear                                                 -     (ii) MOLECULE TYPE: protein                                              -     (vi) ORIGINAL SOURCE:                                                    #BURGDORFERI) ORGANISM: BORRELIA                                                         (B) STRAIN: 19857                                                    -    (vii) IMMEDIATE SOURCE:                                                             (B) CLONE: NS1-19857                                                 -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:8:                                  - Met Asp Pro Asn Thr Val Ser Ser Phe Gln Va - #l Asp Ser Phe Leu Trp          #                15                                                            - His Val Arg Lys Arg Val Ala Asp Gln Glu Le - #u Gly Asp Ala Pro Phe          #            30                                                                - Leu Asp Arg Leu Arg Arg Asp Gln Lys Ser Le - #u Arg Gly Arg Gly Ser          #        45                                                                    - Thr Leu Gly Leu Asp Ile Glu Thr Ala Thr Ar - #g Ala Gly Lys Gln Ile          #    60                                                                        - Val Glu Arg Ile Leu Lys Glu Glu Ser Asp Gl - #u Ala Leu Lys Met Thr          #80                                                                            - Met Gly Lys Gln Asn Val Ser Ser Leu Asp Gl - #u Lys Asn Ser Val Ser          #                95                                                            - Val Asp Val Pro Gly Gly Met Lys Val Leu Va - #l Ser Lys Glu Lys Asn          #           110                                                                - Lys Asp Gly Lys Tyr Asp Leu Met Ala Thr Va - #l Asp Asn Val Asp Leu          #       125                                                                    - Lys Gly Thr Ser Asp Lys Asn Asn Gly Ser Gl - #y Ile Leu Glu Gly Val          #   140                                                                        - Lys Ala Asp Lys Ser Lys Val Lys Leu Thr Va - #l Ala Asp Asp Leu Ser          145                 1 - #50                 1 - #55                 1 -        #60                                                                            - Lys Thr Thr Leu Glu Val Leu Lys Glu Asp Gl - #y Thr Val Val Ser Arg          #               175                                                            - Lys Val Thr Ser Lys Asp Lys Ser Thr Thr Gl - #u Ala Lys Phe Asn Glu          #           190                                                                - Lys Gly Glu Leu Ser Glu Lys Thr Met Thr Ar - #g Ala Asn Gly Thr Thr          #       205                                                                    - Leu Glu Tyr Ser Gln Met Thr Asn Glu Asp As - #n Ala Ala Lys Ala Val          #   220                                                                        - Glu Thr Leu Lys Asn Gly Ile Lys Phe Glu Gl - #y Asn Leu Ala Ser Gly          225                 2 - #30                 2 - #35                 2 -        #40                                                                            - Lys Thr Ala Val Glu Ile Lys Glu Gly Thr Va - #l Thr Leu Lys Arg Glu          #               255                                                            - Ile Asp Lys Asn Gly Lys Val Thr Val Ser Le - #u Asn Asp Thr Ala Ser          #           270                                                                - Gly Ser Lys Lys Thr Ala Ser Trp Gln Glu Se - #r Thr Ser Thr Leu Thr          #       285                                                                    - Ile Ser Ala Asn Ser Lys Lys Thr Lys Asp Le - #u Val Phe Leu Thr Asn          #   300                                                                        - Gly Thr Ile Thr Val Gln Asn Tyr Asp Ser Al - #a Gly Thr Lys Leu Glu          305                 3 - #10                 3 - #15                 3 -        #20                                                                            - Gly Ser Ala Ala Glu Ile Lys Lys Leu Asp Gl - #u Leu Lys Asn Ala Leu          #               335                                                            - Lys                                                                          - (2) INFORMATION FOR SEQ ID NO:9:                                             -      (i) SEQUENCE CHARACTERISTICS:                                           #pairs    (A) LENGTH: 1017 base                                                          (B) TYPE: nucleic acid                                                         (C) STRANDEDNESS: single                                                       (D) TOPOLOGY: linear                                                 -     (ii) MOLECULE TYPE: DNA (genomic)                                        -     (vi) ORIGINAL SOURCE:                                                    #BURGDORFERI) ORGANISM: BORRELIA                                                         (B) STRAIN: ACA1                                                     -    (vii) IMMEDIATE SOURCE:                                                             (B) CLONE: NS1-ACA1                                                  -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:9:                                  - ATGGATCCAA ACACTGTGTC AAGCTTTCAG GTAGATTCCT TTCTTTGGCA TG - #TCCGCAAA          60                                                                           - CGAGTTGCAG ACCAAGAACT AGGTGATGCC CCATTCCTTG ATCGGCTTCG CC - #GAGATCAG         120                                                                           - AAATCCCTAA GAGGAAGGGG CAGCACTCTT GGTCTGGACA TCGAGACAGC CA - #CACGTGCT         180                                                                           - GGAAAGCAGA TAGTGGAGCG GATTCTGAAA GAAGAATCCG ATGAGGCACT TA - #AAATGACC         240                                                                           - ATGGGAAAGC AAAATGTTAG CAGCCTTGAT GAAAAAAACA GCGCTTCAGT AG - #ATTTGCCT         300                                                                           - GGTGAGATGA AAGTTCTTGT AAGTAAAGAA AAAGACAAAG ACGGTAAGTA CA - #GTCTAAAG         360                                                                           - GCAACAGTAG ACAAGATTGA GCTAAAAGGA ACTTCTGATA AAGACAATGG TT - #CTGGAGTG         420                                                                           - CTTGAAGGTA CAAAAGATGA CAAAAGTAAA GCAAAATTAA CAATTGCTGA CG - #ATCTAAGT         480                                                                           - AAAACCACAT TCGAACTTTT CAAAGAAGAT GGCAAAACAT TAGTGTCAAG AA - #AAGTAAGT         540                                                                           - TCTAAAGACA AAACATCAAC AGATGAAATG TTCAATGAAA AAGGTGAATT GT - #CTGCAAAA         600                                                                           - ACCATGACAA GAGAAAATGG AACCAAACTT GAATATACAG AAATGAAAAG CG - #ATGGAACC         660                                                                           - GGAAAAGCTA AAGAAGTTTT AAAAAACTTT ACTCTTGAAG GAAAAGTAGC TA - #ATGATAAA         720                                                                           - GTAACATTGG AAGTAAAAGA AGGAACCGTT ACTTTAAGTA AGGAAATTGC AA - #AATCTGGA         780                                                                           - GAAGTAACAG TTGCTCTTAA TGACACTAAC ACTACTCAGG CTACTAAAAA AA - #CTGGCGCA         840                                                                           - TGGGATTCAA AAACTTCTAC TTTAACAATT AGTGTTAACA GCAAAAAAAC TA - #CACAACTT         900                                                                           - GTGTTTACTA AACAAGACAC AATAACTGTA CAAAAATACG ACTCCGCAGG TA - #CCAATTTA         960                                                                           - GAAGGCACAG CAGTCGAAAT TAAAACACTT GATGAACTTA AAAACGCTTT AA - #AATAA           1017                                                                           - (2) INFORMATION FOR SEQ ID NO:10:                                            -      (i) SEQUENCE CHARACTERISTICS:                                           #acids    (A) LENGTH: 338 amino                                                          (B) TYPE: amino acid                                                           (C) STRANDEDNESS: single                                                       (D) TOPOLOGY: linear                                                 -     (ii) MOLECULE TYPE: protein                                              -     (vi) ORIGINAL SOURCE:                                                    #BURGDORFERI) ORGANISM: BORELLIA                                                         (B) STRAIN: ACAI                                                     -    (vii) IMMEDIATE SOURCE:                                                             (B) CLONE: NS1-ACA1                                                  -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:10:                                 - Met Asp Pro Asn Thr Val Ser Ser Phe Gln Va - #l Asp Ser Phe Leu Trp          #                15                                                            - His Val Arg Lys Arg Val Ala Asp Gln Glu Le - #u Gly Asp Ala Pro Phe          #            30                                                                - Leu Asp Arg Leu Arg Arg Asp Gln Lys Ser Le - #u Arg Gly Arg Gly Ser          #        45                                                                    - Thr Leu Gly Leu Asp Ile Glu Thr Ala Thr Ar - #g Ala Gly Lys Gln Ile          #    60                                                                        - Val Glu Arg Ile Leu Lys Glu Glu Ser Asp Gl - #u Ala Leu Lys Met Thr          #80                                                                            - Met Gly Lys Gln Asn Val Ser Ser Leu Asp Gl - #u Lys Asn Ser Ala Ser          #                95                                                            - Val Asp Leu Pro Gly Glu Met Lys Val Leu Va - #l Ser Lys Glu Lys Asp          #           110                                                                - Lys Asp Gly Lys Tyr Ser Leu Lys Ala Thr Va - #l Asp Lys Ile Glu Leu          #       125                                                                    - Lys Gly Thr Ser Asp Lys Asp Asn Gly Ser Gl - #y Val Leu Glu Gly Thr          #   140                                                                        - Lys Asp Asp Lys Ser Lys Ala Lys Leu Thr Il - #e Ala Asp Asp Leu Ser          145                 1 - #50                 1 - #55                 1 -        #60                                                                            - Lys Thr Thr Phe Glu Leu Phe Lys Glu Asp Gl - #y Lys Thr Leu Val Ser          #               175                                                            - Arg Lys Val Ser Ser Lys Asp Lys Thr Ser Th - #r Asp Glu Met Phe Asn          #           190                                                                - Glu Lys Gly Glu Leu Ser Ala Lys Thr Met Th - #r Arg Glu Asn Gly Thr          #       205                                                                    - Lys Leu Glu Tyr Thr Glu Met Lys Ser Asp Gl - #y Thr Gly Lys Ala Lys          #   220                                                                        - Glu Val Leu Lys Asn Phe Thr Leu Glu Gly Ly - #s Val Ala Asn Asp Lys          225                 2 - #30                 2 - #35                 2 -        #40                                                                            - Val Thr Leu Glu Val Lys Glu Gly Thr Val Th - #r Leu Ser Lys Glu Ile          #               255                                                            - Ala Lys Ser Gly Glu Val Thr Val Ala Leu As - #n Asp Thr Asn Thr Thr          #           270                                                                - Gln Ala Thr Lys Lys Thr Gly Ala Trp Asp Se - #r Lys Thr Ser Thr Leu          #       285                                                                    - Thr Ile Ser Val Asn Ser Lys Lys Thr Thr Gl - #n Leu Val Phe Thr Lys          #   300                                                                        - Gln Asp Thr Ile Thr Val Gln Lys Tyr Asp Se - #r Ala Gly Thr Asn Leu          305                 3 - #10                 3 - #15                 3 -        #20                                                                            - Glu Gly Thr Ala Val Glu Ile Lys Thr Leu As - #p Glu Leu Lys Asn Ala          #               335                                                            - Leu Lys                                                                      - (2) INFORMATION FOR SEQ ID NO:11:                                            -      (i) SEQUENCE CHARACTERISTICS:                                           #pairs    (A) LENGTH: 1017 base                                                          (B) TYPE: nucleic acid                                                         (C) STRANDEDNESS: single                                                       (D) TOPOLOGY: linear                                                 -     (ii) MOLECULE TYPE: DNA (genomic)                                        -     (vi) ORIGINAL SOURCE:                                                    #BURGDORFERI) ORGANISM: BORRELIA                                                         (B) STRAIN: ZS7                                                      -    (vii) IMMEDIATE SOURCE:                                                             (B) CLONE: NS1-ZS7                                                   -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:11:                                 - ATGGATCCAA ACACTGTGTC AAGCTTTCAG GTAGATTCCT TTCTTTGGCA TG - #TCCGCAAA          60                                                                           - CGAGTTGCAG ACCAAGAACT AGGTGATGCC CCATTCCTTG ATCGGCTTCG CC - #GAGATCAG         120                                                                           - AAATCCCTAA GAGGAAGGGG CAGCACTCTT GGTCTGGACA TCGAGACAGC CA - #CACGTGCT         180                                                                           - GGAAAGCAGA TAGTGGAGCG GATTCTGAAA GAAGAATCCG ATGAGGCACT TA - #AAATGACC         240                                                                           - ATGGGAAAGC AAAATGTTAG CAGCCTTGAC GAGAAAAACA GCGTTTCAGT AG - #ATTTGCCT         300                                                                           - GGTGAAATGA ACGTTCTTGT AAGCAAAGAA AAAAACAAAG ACGGCAAGTA CG - #ATCTAATT         360                                                                           - GCAACAGTAG ACAAGCTTGA GCTTAAAGGA ACTTCTGATA AAAACAATGG AT - #CTGGAGTA         420                                                                           - CTTGAAGGCG TAAAAGCTGA CAAAAGTAAA GTAAAATTAA CAATTTCTGA CG - #ATCTAGGT         480                                                                           - CAAACCACAC TTGAAGTTTT CAAAGAAGAT GGCAAAACAC TAGTATCAAA AA - #AAGTAACT         540                                                                           - TCCAAAGACA AGTCATCAAC AGAAGAAAAA TTCAATGAAA AAGGTGAAGT AT - #CTGAAAAA         600                                                                           - ATAATAACAA GAGCAGACGG AACCAGACTT GAATACACAG AAATTAAAAG CG - #ATGGATCT         660                                                                           - GGAAAAGCTA AAGAGGTTTT AAAAAGCTAT GTTCTTGAAG GAACTTTAAC TG - #CTGAAAAA         720                                                                           - ACAACATTGG TGGTTAAAGA AGGAACTGTT ACTTTAAGCA AAAATATTTC AA - #AATCTGGG         780                                                                           - GAAGTTTCAG TTGAACTTAA TGACACTGAC AGTAGTGCTG CTACTAAAAA AA - #CTGCAGCT         840                                                                           - TGGAATTCAG GCACTTCAAC TTTAACAATT ACTGTAAACA GTAAAAAAAC TA - #AAGACCTT         900                                                                           - GTGTTTACAA AAGAAAACAC AATTACAGTA CAACAATACG ACTCAAATGG CA - #CCAAATTA         960                                                                           - GAGGGGTCAG CAGTTGAAAT TACAAAACTT GATGAAATTA AAAACGCTTT AA - #AATAA           1017                                                                           - (2) INFORMATION FOR SEQ ID NO:12:                                            -      (i) SEQUENCE CHARACTERISTICS:                                           #acids    (A) LENGTH: 338 amino                                                          (B) TYPE: amino acid                                                           (C) STRANDEDNESS: single                                                       (D) TOPOLOGY: linear                                                 -     (ii) MOLECULE TYPE: protein                                              -     (vi) ORIGINAL SOURCE:                                                    #BURGDORFERI) ORGANISM: BORRELIA                                                         (B) STRAIN: ZS7                                                      -    (vii) IMMEDIATE SOURCE:                                                             (B) CLONE: NS1-ZS7                                                   -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:12:                                 - Met Asp Pro Asn Thr Val Ser Ser Phe Gln Va - #l Asp Ser Phe Leu Trp          #                15                                                            - His Val Arg Lys Arg Val Ala Asp Gln Glu Le - #u Gly Asp Ala Pro Phe          #            30                                                                - Leu Asp Arg Leu Arg Arg Asp Gln Lys Ser Le - #u Arg Gly Arg Gly Ser          #        45                                                                    - Thr Leu Gly Leu Asp Ile Glu Thr Ala Thr Ar - #g Ala Gly Lys Gln Ile          #    60                                                                        - Val Glu Arg Ile Leu Lys Glu Glu Ser Asp Gl - #u Ala Leu Lys Met Thr          #80                                                                            - Met Gly Lys Gln Asn Val Ser Ser Leu Asp Gl - #u Lys Asn Ser Val Ser          #                95                                                            - Val Asp Leu Pro Gly Glu Met Asn Val Leu Va - #l Ser Lys Glu Lys Asn          #           110                                                                - Lys Asp Gly Lys Tyr Asp Leu Ile Ala Thr Va - #l Asp Lys Leu Glu Leu          #       125                                                                    - Lys Gly Thr Ser Asp Lys Asn Asn Gly Ser Gl - #y Val Leu Glu Gly Val          #   140                                                                        - Lys Ala Asp Lys Ser Lys Val Lys Leu Thr Il - #e Ser Asp Asp Leu Gly          145                 1 - #50                 1 - #55                 1 -        #60                                                                            - Gln Thr Thr Leu Glu Val Phe Lys Glu Asp Gl - #y Lys Thr Leu Val Ser          #               175                                                            - Lys Lys Val Thr Ser Lys Asp Lys Ser Ser Th - #r Glu Glu Lys Phe Asn          #           190                                                                - Glu Lys Gly Glu Val Ser Glu Lys Ile Ile Th - #r Arg Ala Asp Gly Thr          #       205                                                                    - Arg Leu Glu Tyr Thr Glu Ile Lys Ser Asp Gl - #y Ser Gly Lys Ala Lys          #   220                                                                        - Glu Val Leu Lys Ser Tyr Val Leu Glu Gly Th - #r Leu Thr Ala Glu Lys          225                 2 - #30                 2 - #35                 2 -        #40                                                                            - Thr Thr Leu Val Val Lys Glu Gly Thr Val Th - #r Leu Ser Lys Asn Ile          #               255                                                            - Ser Lys Ser Gly Glu Val Ser Val Glu Leu As - #n Asp Thr Asp Ser Ser          #           270                                                                - Ala Ala Thr Lys Lys Thr Ala Ala Trp Asn Se - #r Gly Thr Ser Thr Leu          #       285                                                                    - Thr Ile Thr Val Asn Ser Lys Lys Thr Lys As - #p Leu Val Phe Thr Lys          #   300                                                                        - Glu Asn Thr Ile Thr Val Gln Gln Tyr Asp Se - #r Asn Gly Thr Lys Leu          305                 3 - #10                 3 - #15                 3 -        #20                                                                            - Glu Gly Ser Ala Val Glu Ile Thr Lys Leu As - #p Glu Ile Lys Asn Ala          #               335                                                            - Leu Lys                                                                      __________________________________________________________________________ 

We claim:
 1. A vaccine comprising at least two purified OspA proteins from different Borrelia burgdorferi subgroups wherein at least two of said purified OspA proteins are selected from the group consisting of: subgroup I, subgroup II, subgroup III, subgroup IV, subgroup V and subgroup VI.
 2. The vaccine of claim 1 wherein one OspA protein of the Borrelia burgdorferi subgroups is from subgroup II.
 3. The vaccine of claim 2 wherein the (strain) OspA protein of Borrelia burgdorferi subgroup is ZQ1 or NE11H.
 4. The vaccine of claim 2 wherein the OspA protein of subgroup II is the sequence as set forth in SEQ ID No:2.
 5. The vaccine of claim 1 wherein the Borrelia burgdorferi subgroups comprise subgroup I and subgroup II.
 6. The vaccine of claim 5 wherein the (strain) OspA protein of Borrelia burgdorferi subgroup I is B31, ZS7 or N40.
 7. The vaccine of claim 5 which comprises Borrelia burgdorferi strain ZS7 from subgroup I and Borrelia burgdorferi strain ZQ1 from subgroup II.
 8. The vaccine of claim 1 wherein the Borrelia burgdorferi subgroups comprise subgroup I, subgroup II and subgroup IV.
 9. The vaccine of claim 8 wherein the (strain) OspA protein of Borrelia burgdorferi subgroup IV is ACA-1.
 10. The vaccine of claim 1 wherein Borrelia burgdorferi subgroups comprise subgroup I, subgroup II, subgroup III and subgroup IV.
 11. The vaccine of claim 10 wherein the OspA protein of subgroup III is the sequence as set froth in SEQ ID No:4.
 12. The vaccine of claim 1 comprising NS1-OspA fusion proteins in admixture with a suitable carrier.
 13. A method to protect against infection by two or more Borrelia burgdorferi subgroups comprising administering an immunologically effective amount of the vaccine of claim
 1. 14. An OspA protein containing the amino acid sequence sat forth in SEQ ID No:4.
 15. A method of treating a mammal susceptible to infection by B. bargdorferi comprising administering an immunologically effective amount of the protein as claimed in claim
 14. 